Endograft device delivery systems and associated methods
Inventors
Cragg, Andrew H. • Logan, John
Assignees
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Publication Number
US-9737426-B2
Publication Date
2017-08-22
Expiration Date
Abstract
Modular endograft devices and associated systems and methods are disclosed herein. In several embodiments, an endograft system can include constrained first and second endograft devices that extend across a vascular defect and expanded to press mating septal walls against each other. At least one of the endograft devices can include a fenestration that is aligned with a renal artery to provide bloodflow to the artery. A delivery device configured in accordance with the present technology can include a guidewire that passes through the fenestration to guide the endograft to an implant site and self align the fenestration with the renal artery to facilitate connection of the endograft to the renal artery. An additional stent can be connected to the fenestration to secure the renal artery to the endograft device.
Core Innovation
The disclosure relates to a modular bi-luminal endograft system for repairing a vascular defect, in which a first endograft device and a second endograft device are independently delivered. The endograft devices expand to press and seal mating septal walls across an aneurysm or vascular defect, enabling a controlled interaction between independently positioned components.
At least one endograft device includes renal-aligned fenestrations for perfusion. The fenestration geometry and positional configuration are described to support alignment with a renal artery, including customization using fenestration angular and positional parameters and a referenced fenestration axis and offset relative to septal wall geometry.
A low-profile, constrained delivery system architecture is described using catheter components including an inner tube, nose cone, pusher tube, and sheath. The catheter and endograft together define a guidewire path configured to direct a guidewire through the delivery system, with the distal guidewire path passing through a transverse slot and a transverse opening proximate a separation that enables uncovering and expansion of the expandable frame.
Claims Coverage
The provided independent claim is clm-00001. It covers an endograft delivery system with four inventive features: a catheter-defined guidewire path, a delivery chamber, a low-profile expandable endograft configured to expand when uncovered, and a distal catheter structure with transverse slot and transverse opening features.
Guidewire path through catheter slots proximate separation
The catheter and endograft together define a guidewire path configured to direct a guidewire through the endograft delivery system, with the guidewire path passing through the transverse slot of the inner tube and the transverse opening of the pusher tube proximate to the separation.
Delivery chamber defined by sheath edge and nose cone cylindrical wall edge separation
A sheath slidably disposed over the pusher tube has a distal end terminating at a sheath edge facing the cylindrical wall edge of the nose cone to define a separation therebetween, and the distal end of the sheath and the pusher tube define a second internal volume communicating with the first internal volume to define a delivery chamber.
Low-profile expandable endograft in delivery chamber that expands upon uncovering
An endograft device is disposed within the delivery chamber of the catheter, with an expandable frame in a low-profile configuration and configured to expand to an expanded configuration when the separation between the sheath edge and the cylindrical wall edge is sufficiently increased to uncover the endograft device.
Catheter distal end structure with inner tube transverse slot and pusher transverse opening
A catheter comprises an inner tube with a distal transverse slot communicating with the inner lumen and extending in the proximal direction, and a pusher tube slidably disposed over the inner tube with a distal transverse opening communicating with the inner tube, where the pusher tube distal end is at least in part disposed within a first internal volume of the nose cone.
The claim defines a delivery system in which a catheter-defined guidewire path passes through the inner tube transverse slot and the pusher transverse opening to a distal location through a separation defined between the sheath edge and the nose cone cylindrical wall edge, enabling a low-profile expandable endograft frame to expand after sufficient uncovering.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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